The pytest testing tool makes it easy to write small tests, yet scales to
support complex functional testing.
Features:
* Auto-discovery of test modules and functions
* Detailed info on failing assert statements
* Modular fixtures for managing small or parametrized long-lived test
resources
* Multi-paradigm support: you can use pytest to run test suites based on
unittest (or trial), nose
* Single-source compatibility from Python2.6 all the way up to Python3.4,
PyPy-2.3, (jython-2.5 untested)
* Many external plugins
WWW: http://pytest.org